package com.isunland.managesystem.utils;

import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Locale;

public class NumberUtil {

  /**
   * 数字转换为汉语中人民币的大写<br>
   *
   * @author hongten
   * @contact hongtenzone@foxmail.com
   * @create 2013-08-13
   */

  /**
   * 汉语中数字大写
   */
  private static final String[] CN_UPPER_NUMBER = {
      "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"
  };
  /**
   * 汉语中货币单位大写，这样的设计类似于占位符
   */
  private static final String[] CN_UPPER_MONETRAY_UNIT = {
      "分", "角", "元", "拾", "佰", "仟", "万", "拾", "佰", "仟", "亿", "拾", "佰", "仟", "兆", "拾", "佰", "仟"
  };
  /**
   * 特殊字符：整
   */
  private static final String CN_FULL = "整";
  /**
   * 特殊字符：负
   */
  private static final String CN_NEGATIVE = "负";
  /**
   * 金额的精度，默认值为2
   */
  private static final int MONEY_PRECISION = 2;
  /**
   * 特殊字符：零元整
   */
  private static final String CN_ZEOR_FULL = "零元" + CN_FULL;

  /**
   * 把输入的金额转换为汉语中人民币的大写
   *
   * @param numberOfMoney 输入的金额
   * @return 对应的汉语大写
   */
  public static String number2CNMontrayUnit(Double d) {
    if (d == null) {
      return null;
    }
    BigDecimal numberOfMoney;
    try {
      numberOfMoney = BigDecimal.valueOf(d);
    } catch (Exception e) {
      // Auto-generated catch block
      e.printStackTrace();
      return null;
    }
    StringBuffer sb = new StringBuffer();
    // -1, 0, or 1 as the value of this BigDecimal is negative, zero, or
    // positive.
    int signum = numberOfMoney.signum();
    // 零元整的情况
    if (signum == 0) {
      return CN_ZEOR_FULL;
    }
    // 这里会进行金额的四舍五入
    long number = numberOfMoney.movePointRight(MONEY_PRECISION).setScale(0, 4).abs().longValue();
    // 得到小数点后两位值
    long scale = number % 100;
    int numUnit = 0;
    int numIndex = 0;
    boolean getZero = false;
    // 判断最后两位数，一共有四中情况：00 = 0, 01 = 1, 10, 11
    if (!(scale > 0)) {
      numIndex = 2;
      number = number / 100;
      getZero = true;
    }
    if ((scale > 0) && (!(scale % 10 > 0))) {
      numIndex = 1;
      number = number / 10;
      getZero = true;
    }
    int zeroSize = 0;
    while (true) {
      if (number <= 0) {
        break;
      }
      // 每次获取到最后一个数
      numUnit = (int) (number % 10);
      if (numUnit > 0) {
        if ((numIndex == 9) && (zeroSize >= 3)) {
          sb.insert(0, CN_UPPER_MONETRAY_UNIT[6]);
        }
        if ((numIndex == 13) && (zeroSize >= 3)) {
          sb.insert(0, CN_UPPER_MONETRAY_UNIT[10]);
        }
        sb.insert(0, CN_UPPER_MONETRAY_UNIT[numIndex]);
        sb.insert(0, CN_UPPER_NUMBER[numUnit]);
        getZero = false;
        zeroSize = 0;
      } else {
        ++zeroSize;
        if (!(getZero)) {
          sb.insert(0, CN_UPPER_NUMBER[numUnit]);
        }
        if (numIndex == 2) {
          if (number > 0) {
            sb.insert(0, CN_UPPER_MONETRAY_UNIT[numIndex]);
          }
        } else if (((numIndex - 2) % 4 == 0) && (number % 1000 > 0)) {
          sb.insert(0, CN_UPPER_MONETRAY_UNIT[numIndex]);
        }
        getZero = true;
      }
      // 让number每次都去掉最后一个数
      number = number / 10;
      ++numIndex;
    }
    // 如果signum == -1，则说明输入的数字为负数，就在最前面追加特殊字符：负
    if (signum == -1) {
      sb.insert(0, CN_NEGATIVE);
    }
    // 输入的数字小数点后两位为"00"的情况，则要在最后追加特殊字符：整
    if (!(scale > 0)) {
      sb.append(CN_FULL);
    }
    return sb.toString();
  }

  // public static void main(String[] args) {
  // double money = 2020004.01;
  // BigDecimal numberOfMoney = new BigDecimal(money);
  // String s = NumberUtil.number2CNMontrayUnit(numberOfMoney);
  // System.out.println("你输入的金额为：【" + money + "】 #--# [" + s.toString() +
  // "]");
  // }

  /**
   * @return String
   * @Title: bigDoubleToString
   * @Description: 将大数字转换为String, 直接toString会显示为1.0E7这样的格式.
   */
  public static String numberBigToString(Double aDouble) {
    if (aDouble == null) {
      return null;
    }
    DecimalFormat nf = (DecimalFormat) NumberFormat.getInstance(Locale.CHINA);
    try {
      String aString = Double.toString(aDouble);
      return nf.parse(aString).toString();
    } catch (Exception e) {
      // Auto-generated catch block
      e.printStackTrace();
      return null;
    }
  }

  /**
   * @return Double
   * @Title: roundTwo
   * @Description: 四舍五入, 保留两位小数
   */
  public static Double roundTwo(double f) {
    try {
      BigDecimal bg = new BigDecimal(f);
      return bg.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
    } catch (Exception e) {
      // Auto-generated catch block
      e.printStackTrace();
      return null;
    }
  }
}
